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TSR "Pro Built" Ball Differentials makes it easy to upgrade your differential for more durability and improved performance. Built in-house at TSR utilizing TKO diff rings which are machined flat using TKO's proprietary process to within 2 microns and are parallel to within 1 micron with a #7 finish (one micron is 40 millionths of an inch - .0000040). After processing, the rings are checked with an optical flat and monochromatic light, the ultimate measurement for flatness.

Pro Spec builds include pure ceramic diff balls plus a full array of available custom options. Once completed all TSR "Pro Built" Ball Diffs are properly seated with the initial break-in preformed prior to shipment to get you back on the track faster. Optional Tungsten Carbide or Si3N4 Silicon Nitride Ceramic balls are available for the thrust bearing and main diff gears. Our ceramic diff balls are manufactured out of a extra-hard Silicon Nitride Ceramic material, which significantly improves the differentials lifespan, increases RPM capabilities, provides increased corrosion and wear resistance as well as reducing friction, vibration and offering the capability of holding up to lighter differential settings better than standard steel balls included in most kits. Tungsten Carbide and Si3N4 ceramic thrust balls are available as caged versions for racers seeking less routine maintenance.

At TSR, we race and understand the kind of discipline and commitment needed to win at the highest level. Time in the pits is time lost on the track and our goal is to keep you out of the pits and out on the track.

SN253441-RB6.6-PS-PBT

Made in Japan

1 set

(Pro Built items usually ship within 2-3 business days from order date)